Johann georg pinkert



No. 607,548. Patented July 19, I898.

v l. G. PINKEBT.

SELF ACTING CLOSING DEVICE FOR PROPELLER PIPES.

(Application filed Dec. 30, 1897.)

(No Model.)

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UNITED STATES PATENT OFFICE.

JOHANN GEORG PINKERT, OF HAMBURG, GERMANY.

SELFv-ACTING CLOSING DEVICE FOR PROPELLER-PIPES.

SPECIFICATION forming part of Letters Patent No. 607,548, dated July 19,1898.

Application filed December 30, 1897. Serial No. 664,517. (No model.)Patented in England March 30, 1896, No. 6,872, and in France June 24,1897, No. 263,157.

To all whmn it may concern.-

Be it known that I, J OHANN GEORG PINK- ERT, engineer, a subject of theGerman Emperor, residing at Hamburg, 120 Papen strasse, in the free townof Hamburg, in the German Empire, have invented new and usef ulSelf-Acting Closing Devices for Propeller- Pipes, (for which I havereceived Letters Patent in England, No. 6,872, dated March 30, 1896, andin France, No. 268,157, dated June 24, 1897,) of which the following isa specification.

My invention relates toa self-acting closing device for thedischarge-pipes of motors for propelling vessels by reaction Without theemployment of any other propelling means, and has forits objects to forma watertight closing of these discharge-pipes when in the closedposition and to distribute the discharges over a larger area whenopened.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which Figure 1 is a side view of the closin g device; Fig.2, a back view of same; Fig. 3, a longitudinal section of same with thedevice in the closed position; Fig. 4, a similar section with the devicein the opened position. Figs. 5 and 6 are longitudinal sections showingmodified forms of the said closing device, and Fig. 7 a cross-sectiontaken on the line Y Z of Fig. 5.

The outlet-opening K of the discharge or propeller pipe B is providedwith the automatically-acting closing or obturating device. This closingdevice consists of the obturatingcone S, cross-bars T, and guide-rods U.The obturator S is of a more or less pointed conical shape, as shown inFigs. 3 to 5, of sugarloaf shape, as shown in Fig. 6, or it may be ofparaboloidal shape. Itshould be ground into its seating at the end ofthe walls L of the discharge-pipe opening K in order to form awater-tight joint therewith when in the closed position. Theobturating-cone S prevents, on the one hand, when closed, the entranceof water into the discharge or propeller pipe B, and, on the other hand,when opened, distributes the discharges of the mo-- tive forces over alarger area. In order to divide the issuing forces into a more jet-likeform, the cone S may be made star shape in cross-section, as shown inFigs. 5 and 7.. It is obvious that in this case the seat-ing L must beshaped to correspond. The cone S is guided in the guides O and D of thepipe B by means of the Crossbars T and guide rods U. On the guide-rods Usprings are placed, bearing at one end against the collars X of theguide-rods U and at the other end against the guides D. These springsshould have sufficient strength so as to insure the closing oftheobturator S, but should not oifer any appreciable resistance to thepres sure of the issuing forces. The closing of the obturator is,however, normally effected automatically by the pressure of the outerwater. The effect of the said springs WV could be obtained by any otherarrangement,

such as vacuum, air-pressure, and the like.

The closing device acts in the following manner: The explosions or othermotive forces produce an excess of pressure in B, which presses outwardthe easily-moved cone S. Themotive forces can then pass out through theannular opening thus formed between the cone S and the walls L of thedischarge or propeller pipe opening K, as shown by the arrows in Fig. 4,whereby the pressure of the issuing forces is distributed onto acomparatively large quantity of water and is thus effectively utilized.When the pressure produced in B ceases, the external water, assisted bythe Springs W or other means, closes the cone S against the end of theopening K, and the entrance of water into the interior of the motor isthereby prevented.

Having now particularly described and ascertained the nature of the saidinvention and inwhat manner the sameis to be performed, I declare thatwhat I claim, and desire to secure by Letters Patent, is

An automatically-acting water-tight closing device, characterized by aneasily-moved obturator in the form of a pointed cone, a sugar-loaf, or aparaboloid, placed at the discharge-opening of the propeller-pipe, whichobturator, when opened, distributes theissuing forces of explosions orother means onto a comparatively large quantity of water, and, whenclosed, preventing the entrance of water into the interior of thepropeller-pipe, all substantially as, and for the purpose as describedin the annexed specification.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

JOHANN GEORG PINKERT.

Witnesses:

HERM. LEBO SoHUTzE, F. O. Boz, Sr.

